Control rod driving mechanism for ship reactor

A driving mechanism and reactor technology, which is applied in the field of ship reactors, can solve the problems that nuclear safety cannot be guaranteed, ship reactors cannot be used directly, and the reactor cannot be shut down by dropping rods, so as to reduce water resistance and increase the speed of rod drop

Pending Publication Date: 2019-07-09
中广核工程有限公司 +2
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  • Abstract
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Problems solved by technology

[0008] However, this mechanism cannot be directly used in ship reactors, because the reactor is always in a rocking state when the ship is sailing. At this time, the CRDM cannot always maintain a fixed vertical state, and it is no longer possible to rely solely on gravity as the driving force for the control rods to be inserted into the core. Safely implement the drop action
When the ship reactor tilts at a large angle

Method used

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  • Control rod driving mechanism for ship reactor
  • Control rod driving mechanism for ship reactor
  • Control rod driving mechanism for ship reactor

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Embodiment Construction

[0030] In order to make the purpose, technical solution and technical effect of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.

[0031] see figure 1 As shown, the control rod driving mechanism for a marine reactor of the present invention includes: a pressure-resistant shell part 1, an auxiliary rod drop part 2, a rod position detector part 3, a claw part 5, a drive rod part 4 and a coil part 6; The shell part 1 includes the upper end plug, the rod travel sleeve and the lower sealing shell. The sealing shell is fixedly connected with the top cover of the pressure vessel to form a pressure boundary together. The coil part 6 is set outside the pressure-resistant shell part 1, consisting ...

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Abstract

The invention discloses a control rod driving mechanism for a ship reactor. The control rod driving mechanism comprises a pressure-resistant shell component, a rod-falling auxiliary component, a rod position detector component, a claw component, a driving rod component and a coil component; the pressure-resistant shell part comprises an end plug at an upper part, a rod travel sleeve, and a sealingshell at a lower part; the sealing shell is fixedly connected with a pressure container top cover, so that a pressure boundary is jointly formed. The driving mechanism is characterized in that the coil component sleeves the outer side of the pressure-resistant shell component and consists of three electromagnetic coils and a magnet yoke, the three electromagnetic coils are respectively a liftingcoil, a moving coil and a fixed coil from top to bottom; the claw component is provided with an iron core assembly corresponding to the coil component, the iron core assembly comprises a locking ironcore assembly, a lifting iron core assembly, a movable iron core assembly and a fixed iron core assembly from top to bottom, and the lifting coil provides an electromagnetic field for the locking ironcore assembly and the lifting iron core assembly of the claw component at the same time.

Description

technical field [0001] The invention belongs to the field of ship reactors, and more specifically, the invention relates to a control rod driving mechanism for a ship reactor. Background technique [0002] The Control Rod Drive Mechanism (CRDM for short) is the action actuator of the important control system and safety protection system of the reactor. Normal or accident shutdown. [0003] At present, there are three main types of control rod drive mechanisms used in nuclear power reactors: [0004] 1) Reluctance motor type control rod drive mechanism; [0005] 2) Rack and pinion control rod drive mechanism; [0006] 3) Electromagnetic lifting step-type control rod drive mechanism. [0007] Compared with other types of drive mechanisms, the electromagnetic lift step-type control rod drive mechanism has the advantages of simple structure, large lifting force, long life, and easy maintenance and replacement, so electromagnetic lift step-type control rods are commonly used ...

Claims

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Application Information

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IPC IPC(8): G21C7/12G21C7/14
CPCG21C7/14G21C7/12Y02E30/30
Inventor 魏乔苑李跃忠赵毛毛吴和北张飞刘言午
Owner 中广核工程有限公司
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